An -algebra approach to Artin’s solution of Hilbert’s Seventeenth Problem

Stuart A. Steinberg[1]

  • [1] The University of Toledo Toledo, Ohio, U.S.A.

Annales de la faculté des sciences de Toulouse Mathématiques (2010)

  • Volume: 19, Issue: S1, page 215-220
  • ISSN: 0240-2963

Abstract

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Using lattice-ordered algebras it is shown that a totally ordered field which has a unique total order and is dense in its real closure has the property that each of its positive semidefinite rational functions is a sum of squares.

How to cite

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Steinberg, Stuart A.. "An $\ell $-algebra approach to Artin’s solution of Hilbert’s Seventeenth Problem." Annales de la faculté des sciences de Toulouse Mathématiques 19.S1 (2010): 215-220. <http://eudml.org/doc/115898>.

@article{Steinberg2010,
abstract = {Using lattice-ordered algebras it is shown that a totally ordered field which has a unique total order and is dense in its real closure has the property that each of its positive semidefinite rational functions is a sum of squares.},
affiliation = {The University of Toledo Toledo, Ohio, U.S.A.},
author = {Steinberg, Stuart A.},
journal = {Annales de la faculté des sciences de Toulouse Mathématiques},
keywords = {lattice-ordered algebra; Hilbert's seventeenth problem},
language = {eng},
month = {4},
number = {S1},
pages = {215-220},
publisher = {Université Paul Sabatier, Toulouse},
title = {An $\ell $-algebra approach to Artin’s solution of Hilbert’s Seventeenth Problem},
url = {http://eudml.org/doc/115898},
volume = {19},
year = {2010},
}

TY - JOUR
AU - Steinberg, Stuart A.
TI - An $\ell $-algebra approach to Artin’s solution of Hilbert’s Seventeenth Problem
JO - Annales de la faculté des sciences de Toulouse Mathématiques
DA - 2010/4//
PB - Université Paul Sabatier, Toulouse
VL - 19
IS - S1
SP - 215
EP - 220
AB - Using lattice-ordered algebras it is shown that a totally ordered field which has a unique total order and is dense in its real closure has the property that each of its positive semidefinite rational functions is a sum of squares.
LA - eng
KW - lattice-ordered algebra; Hilbert's seventeenth problem
UR - http://eudml.org/doc/115898
ER -

References

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  1. E. Artin, Über die Zerlegung definiter Funktionen in Quadrate, Hamb. Abh., 5 (1927), 100–115. Zbl52.0122.01
  2. P. M. Cohn, Universal algebra, Revised edition, Reidel, Dordrecht, 1981. Zbl0461.08001MR620952
  3. P. Erdos, L. Gillman and M. Henriksen, An isomorphism theorem for real-closed fields, Ann. of Math., 61 (1955), 542–554. Zbl0065.02305MR69161
  4. L. Gillman and M. Jerison, Rings of continuous functions, Van Nostrand, Princeton, 1960. Zbl0093.30001MR116199
  5. L. Henkin, Sums of squares, in Summaries of Talks, Summer Institute of Symbolic Logic in 1957 at Cornell University, Institute for Defense Analyses, Princeton, 1960, 284–291. Zbl0201.33201
  6. M. Henricksen and J. R. Isbell, Lattice-ordered rings and function rings, Pacific J. Math., 12 (1962), 533–565. Zbl0111.04302MR153709
  7. N. Jacobson, Lectures in abstract algebra, Volume III - Theory of fields and Galois Theory, Van Nostrand, Princeton, 1964. Zbl0124.27002MR172871
  8. N. Jacobson, Basic algebra II, Freeman, San Francisco, 1980. Zbl0441.16001MR571884
  9. S. Lang, The theory of real places, Ann. Math.57 (1953), 378–391. Zbl0052.03301MR53924
  10. S. Lang and J. T. Tate, The collected papers of Emil Artin, Addison-Wesley, Reading, 1965. Zbl0146.00101MR176888
  11. K. McKenna, New facts about Hilbert’s seventeenth problem, Lecture Notes in Mathematics 498, Model theory and algebra, A memorial tribute to Abraham Robinson, 1975, 220–230. Zbl0357.12019MR401720
  12. A. Pfister, Hilbert’s seventeenth problem and related problems on definite forms, Mathematical developments arising from Hilbert problems, Proceedings of symposia in pure mathematics 28, part 2, Amer. Math. Soc., Providence, 1976, 483–489. Zbl0337.12101MR424679
  13. A. Prestel and C. N. Delzell, Positive polynomials, Springer, Berlin, 2001. Zbl0987.13016MR1829790
  14. E. C. Weinberg, Lectures on ordered groups and rings, University of Illinois, Urbana, 1968. 
  15. E. C. Weinberg, University of Illinois seminar, 1971. 

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